Method for transmitting and receiving discovery message in wireless communication system, and apparatus for same

Abstract

Disclosed herein are a method and apparatus for transmitting and receiving discovery messages in a wireless communication system. Specifically, a method for transmitting and receiving discovery messages in a wireless communication system supporting communication between user equipments (UEs) includes receiving, by a UE in a Radio Resource Control_IDLE (RRC_IDLE) state, information about an allocated resource for transmitting a discovery message from a network and transmitting, by the UE, the discovery message in the resource for transmitting the discovery message. The resource for transmitting the discovery message may be allocated based on a tracking area in which the device is located.

1 . A method for transmitting and receiving discovery messages in a wireless communication system supporting communication between user equipments (UEs), the method comprising:
 receiving, by a UE in a Radio Resource Control_IDLE (RRC_IDLE) state, information about an allocated resource for transmitting a discovery message from a network; and   transmitting, by the UE, the discovery message in the resource for transmitting the discovery message,   wherein the resource for transmitting the discovery message is allocated based on a tracking area in which the device is located.   
     
     
         2 . The method of  claim 1 , wherein the resource for transmitting the discovery message is configured to be matched up with a Tracking Area Identity (TAI) or a TAI list including one or more TAIs. 
     
     
         3 . The method of  claim 1 , wherein the tracking area is variably configured for each UE. 
     
     
         4 . The method of  claim 1 , wherein the information about the resource for transmitting the discovery message is transmitted by a Mobility Management Entity (MME) through an attach accept message or a tracking area update accept message. 
     
     
         5 . The method of  claim 1 , further comprising:
 receiving, by the UE, information about an allocated resource for receiving a discovery message from the network; and   receiving, by the UE, a discovery message transmitted from another UE in the resource for receiving the discovery message,   wherein the resource for receiving the discovery message is allocated based on a tracking area in which the device is located.   
     
     
         6 . The method of  claim 5 , wherein the resource for receiving the discovery message is configured to be matched up with a Tracking Area Identity (TAI) or a TAI list including one or more TAIs. 
     
     
         7 . The method of  claim 5 , wherein the information about the resource for receiving the discovery message is transmitted by a Mobility Management Entity (MME) through an attach accept message or a tracking area update accept message. 
     
     
         8 . A user equipment (UE) transmitting and receiving discovery messages in a wireless communication system supporting communication between UEs, the UE comprising:
 a Radio Frequency (RF) unit configured to transmit/receive radio signals; and   a processor,   wherein the processor is configured to receive information about an allocated resource for transmitting a discovery message from a network and to transmit the discovery message in the resource for transmitting the discovery message,   the resource for transmitting the discovery message is allocated based on a tracking area in which the device is located, and   the device is in a Radio Resource Control_IDLE (RRC_IDLE) state.   
     
     
         9 . The UE of  claim 8 , wherein the processor is further configured to:
 receive information about an allocated resource for receiving a discovery message from the network, and   receive the discovery message transmitted from another UE in the resource for receiving the discovery message, and   the resource for receiving the discovery message is allocated based on a tracking area in which the device is located.